199 
(2) Rhizome elongated, cylindrical, not 
tuberous ; midrib indistinct, 
(2) No persistent sheaths on the rhizome. 
1. O. vulgatium. 
(2) Persistent brown sheaths on the 
rhizome. 
2. O, attchisont. 
(0) Rhizome somewhat tuberous, midrib 
indistinct, plants very minute. 
3. O. nudicaule. 
(c) Rhizome etary tuberous, midrib 
prominent. 
4. O. fibrosum. 
1. Ophtoglossum vulgatum L. 
Under this name we have lumped together 
the hitherto separate species O. vulgatum 
L. and O. reticulatun L. as they are merely 
forms of the same species, being connected by 
a number cf transitional stages. 
Rhizome cylindrical, elongated ; sterile divi- 
sion ef trond 1-4 inches long, 4-2 inches broad, 
ovate, ovate-oblong or lanceolate, blunt or 
acute at the apex, often distinctly cordate at 
the base, stalked or sessile veins clear, otten 
